I don't subscribe to the Charisma pity party . My impression from reading every interview I could find , was that Charisma was a bit of a nightmare to work with .She needed her own acting coach ,was not a quick worker, pushed back on everything , didn't seem to respect her contract , changed her appearance willy nilly . She may have ended up being treated quite poorly but only after making her own bed to lie in . She did still get 7 seasons of work out of it , which she is apparently not grateful for 😀 .
Yeah but it's not just a Charisma pity party.
Gal Gadot, writers on Buffy and Firefly, exes of Joss Whedon, Ray Fisher, Jason Mamoa, Emma Caulfield, Amber Benson, James Marsters, Michelle Trachtenberg and her loved ones, Sarah Michelle Gellar, Nicholas Brendon, members of the production team, all either backed up what she said 100 percent or talked about their own horror stories about Joss, who dismissed them all as him being too nice. Joss also unknowingly admitted to being a narcissist by saying about his current wife that he finally met someone he loved more than himself and said he had to shag around or else he would feel guilty about not doing it with attractive women unlike his wife!
I must admit that Charisma doesn't do herself many favours with her social media presence. She is guilty of a lot of Trump derangement syndrome in her posts. A friend of mine who is a fan, was also blocked by her and she sicced her followers on him because she said that white people can't experience racism and he questioned her on it. Then there is her calling Tulsi Gabbard a coward, simply because she didn't show up to help impeach Trump. Honestly it's disgraceful for her to call a former soldier a coward, but to do it because Tulsi didn't take part in what was just the elites wanting to get rid of Trump for their own stupid reasons, makes her look like a political moron too.
With this in mind I can understand some people thinking that maybe Joss had to deal with her being a nightmare, but ultimately there is no one else who says Charisma was abusive or horrible on set even from Buffy and Angel, never mind any other show she's worked on. Her having trouble with her lines due to anxiety meanwhile, well that's not so unreasonable. Plenty of actors have had that trouble and get round them in various ways.
Patrick Troughton (sorry to get it back to DW.) but he was the same. He almost never learned his lines, and instead just took a basic outline of the script and improved his way around it. This led to a clash when he worked with Jon Pertwee who was very by the book. Even then however Pertwee wrote his lines around the TARDIS console to help remember them, and they had to make accommodations for him in regards to him not being able to remember technobabble and scientific jargon. For instance his catchphrase, REVERSE THE POLARITY OF THE NEUTRON FLOW came about because of that. It was a quick way of avoiding technical stuff.
With this in mind Joss could have worked out something like this to do with Charisma but instead he seemed to come down hard on her and make her anxiety worse.
Of course again this doesn't mean that Joss should be cancelled (I hate cancel culture overall) or that Charisma wasn't being vindictive in sticking the boot in, but still it's certainly not one way or the other.
Meanwhile as for this spin off, well to be honest it does sound like Cordelia fan fic, although hilariously it also doesn't sound like a fix it for her either, as this is an alternate Cordelia? The real one is still dead.
That said it may surprise us. Maybe as a result of Cordelia being the Slayer, in this reality everything has gone to crap. IE Drusilla now runs Sunnydale ala the Wish, and Cordelia is part of a band of rebels like the white hates, desperately trying to stop her, and the alt Cordy's redemption act could be her getting a chance to be a better Slayer in this new reality? Maybe in her old she shrugged her duties as she never grew up like Buffy, and let the vampire population get out of hand? Might make an interesting story if true, but a part of me wonders if it will just be Cordy is fantastic overall. I hope not but we'll see.